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Abstract
The initial step in mutational breeding is to recognize or identify the appropriate varieties containing the suitable genes which donot exist in nature. In nature, the existing varieties which are found to undergo variation are as a result of mutation. This review paper is mainly focussed on the several types of mutagens and improvement of common tropical and temperate region crops through induced mutationespeciallyphysical and chemical mutagens. The crops include the commonly existing plants which provide higher yield with abundant nutritional value, or applied as a remedy for ailments or diseases.